caa a22 4500 477095933 CHVBK 20180405111527.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00187138 doi (NATIONALLICENCE)springer-10.1007/BF00187138 Efferent neurons of the lateral line system and their innervation of lateral line branches in a euteleost and an osteoglossomorph [Elektronische Daten] [T. Wagner, E. Schwartz] The efferent neurons of the lateral line system of the euteleost Aplocheilus lineatus and the osteoglossomorph Pantodon buchholzi, both surface feeding fish, were examined by neuronal tract tracing. Besides horseradish peroxidase, fluorescent dextrans were used as tracers to allow simultaneus visualization of projections from different lateral line branches. Labeled efferent neurons were found in nuclei situated in the medulla ventral of ventricle IV. This position resembles the octavolateralis efferent nucleus of previous studies. The number of labeled cells in the efferent nucleus is low in both species. Most neurons were found ipsilaterally to the application site, some along the midline and only very few contralaterally. The size of efferent cells differs distinctly between Aplocheilus, possessing small cellbodies (length 16.5 μm), and Pantodon, which has very large efferent cells (length 47.0 μm). Efferent axon bundles course rostrally in both species, leaving the brain at the level of the anterior lateral line nerve. Only Aplocheilus has in addition lateral axon bundles leaving the brain at the level of the posterior lateral line nerve. After application of one fluorescent tracer to the lateral ramus and a different fluorescent tracer to the superficial ophtalmic ramus in a given animal, double-labeling of efferent cells hardly ever occurs. If the neuromasts I and IV of the dorsal skull of Pantodon are applied with one fluorescent tracer each, ∼10% of centrally labeled cells are double-labeled. Considering the results of double-labeling, the concept of a differential innervation of lateral line branches is supported and discussed. Springer-Verlag, 1996 Brainstem nationallicence Mechanosensory system nationallicence Otavolateral efferents nationallicence Teleost nationallicence Tract-tracing nationallicence Wagner T. Institut für Tierphysiologie, Wartweg 95, Universität Gießen, D-35392, Gießen, Germany aut Schwartz E. Institut für Tierphysiologie, Wartweg 95, Universität Gießen, D-35392, Gießen, Germany aut Anatomy and Embryology Springer-Verlag 194/3(1996-09-01), 271-278 0340-2061 194:3<271 1996 194 429 https://doi.org/10.1007/BF00187138 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00187138 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wagner T. Institut für Tierphysiologie, Wartweg 95, Universität Gießen, D-35392, Gießen, Germany aut NATIONALLICENCE 700 1- Schwartz E. Institut für Tierphysiologie, Wartweg 95, Universität Gießen, D-35392, Gießen, Germany aut NATIONALLICENCE 773 0- Anatomy and Embryology Springer-Verlag 194/3(1996-09-01), 271-278 0340-2061 194:3<271 1996 194 429 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer